3. The attempt at a solution
For the matrix to be consistent, I knew that the number of non-zero rows had to be less than the number of columns. Hence I tried to get the last row to be 0 0 0 | *; however while I managed to get the last row to become 0 0 1, I don't know how to make it the zero row I want.

I'm wondering if my thought process to make this consistent is correct, or if there is another way I can make this system consistent.